Locomotive-furnace arch.



l. P. NEFF.

LOCOMOTIVE FURNACE ARCH. APPLICATION FILED IAII. s, w16.

@@WWIII ateuted June 12, 19W.

JOHN P. NEFF, OF EAST ORANGE,

PANY, or NEW Yoan, N. Y., A

LOCOIVIOTIVE-FURNACE ARCH.

Application filed January 8, 1916. Serial No. 71,064.

Twill I1li/wm t may concern lie it known that I, JOHN P. NEFF, a citizen ot' the United States, and a resident of East Orange, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in and for Locomotive# Furnace Arches, of which the following is a specification.

My invention relates to improvementsin thc arches of locomotive boiler furnaces and has special reference to improvements in the marginal bricks of those arches which are chiefly supported by water-circulating arch tu )es inthe lire-box, and in which the man ginal bri'jclksfthough partly supported by the oute'rtart/l'i tubes of the group must find the relnainllei" fof their i sheets ot' the lirebox.

. This invention is in the nature of a modification of or improvement upon the marginal brick arrangement disclosed in the C. B. Moore Patent No. 1,160,434, granted Novcmber'li, 1915. While the arrangement shown in the Moore patent is advantageous in many cases, I lind that in some cases trouble is experienced through the dislodgment oi' the inclined marginal bricks from the studs which support the outer ends thereof upon the side sheets. It may be that the trouble is chiefly attrilmtable to the hanging of thesocketed end of the brick upon the arch tube, and also the occasional fusing together of the upper 'ends of the marginal bricks and the adjacent ends of the body` forming or intermediate bricks of the arch. I indalso that it is not always practicable to secure requisite stability in the Moore i marginal bricks by inclining them downward against the side sheet.

'lhe object of my invention is to so modify and improve the patented structure that the marginal bricks of the arch Amay be supported by side sheet studs which are substantiallyon a level with the inclined arch tubes, and yet be effectively held against dislodgment.

A farther objection which I make to the marginal bricks shown in Patent No. 1,160,434 is that the same are not reversible,

but must always be used in one position be' tween the side sheets and the tubes. Such bricks are strongly aliected by the scouring action oit the lire, and it is very desirable that they shall be reversible. Therefore, a further object of my invention is to provide a Specification of Letters Patent.

support upon the side' Patented @1 une 12, 1%17.

marginal brick which may be placed in either position upon its'supports and which may be inverted or turned bottom side up at will. i

The manner in which I attain these objects, and the nature of my invention, will be readily understood on reference to the'drawings which form part of this specification, and in which :-F1gure 1 is a vertical transverse section of a locomotive boiler irebox containing' an arch construction embodying my invention 5- Fig. 2 is a sectional view on a plane perpendicular to the inclined arch\ tubes and Fig. 3 is a flat perspective view y of the several bricks upon the arch tubes.

In Fig. 1 of the drawings, 2 represents the lower part of the iiue sheet of a locomotive boiler rebox. The side sheets,v3, 3, and the crown sheet, 4, are of familiar construction. Likewise the grate, indicated by dotted lines, and also the iniul-ring and i boiler shell shown are all ot' familiar form.

In most cases the firebox will be found to contain four water-circadating'arch tubes, 5, which extend from the lower part or throat of the iue sheet, 2, upwardly and rearwardly, to fastenings in the rearsheet (not shown) of the tirebox.

The intermediate or body-portion of the arch is, substantially, laterally coextcnsive with the group of arch tubes, extending nearly to the vertical middle planes oi' the outer arch tubes. This intermediate part of the arch is composed of a plurality of longitudinal rows ot' rcfractor7 bricks, G, the 90 ends of which rest upon and are supported by the arch tubes. My invention is not concerned with the details of the formation of the intermediate part of the refractory arch; beyond this, 1 prefer that in all cases the 95 outer edges of such intermediate or body l portion of the arch shall not extend beyond the vertical axial planes ot' the outer tubes,

5, The reason for this is that it is desirable to prevent actual or fusing contact between the intern'iediate bricks and the marginal bricks about to be described. l

Upon the inner side ofte-.rch side sheet I provide a row of side sheet studs, 7. i These studs, 7, are arranged; preferably, in a plane, somewhat above the plane which contacts the bottoms of the tubes, 5. They are therefore directly opposite and preferably in horizontal-plane alinement with the outer tubes, 5, 5. For closing the spaces between 15 ently appear,

, fversible.

tory bricks, a,

' respectively,

ferred to'as the sides of the brick.

the side sheets and the outer tubes, 5, as required to prevent direct passage of the flame fromy the fireschamber to the iiues of the boiler, I employ a plurality of refracof peculiar shape. 9, and, 10, of these bricks, which are presented to the side sheets and the tubes, 5, will be described as the ends a. The faces, 11, will be re- Whether the remainingfaces, 12 and 13, shall be described as top and bottom, respectively, depends upon the position in which the brick is placed Ain the firebox, for, as will presthese marginal bricks are reof the brick,

The length'of each brick is approximately determined by the In many substantially parallels l yallof the marginal bricks are of the same bricks only in :is represented in Fig. 3 of the drawiength, ings.

ythe same and operate on the same principle. i f It will be noted that the tops and bottoms of the Ymarginal bricks, a, are substantially arallel planes.' vThe sides, 11, 11, of the 'l ricks are likevvlse substantially parallel planes, preferably perpendicular to the top andbottom. Likewise the ends, 9, and 10, are preferablyl parallel planes, but these e0 planes are angularly disposed to the top and bottom planes. Each endforms an acute angle, 14, with one of the planes, 12, 13, and an yobtuse angle with the other. Thus each brickA is provided with two inclined ends, with acute angles diagonally opposite one another; and each brick is made to present two diagonally extended portions, a',

and a, the lower of which (a) rests againstl the side sheet of the firebox and upon thel E() studs, 7, while the upper extension, a, overf hangsthe adjacent tube, 5. The angling of the'outer end removes its upper part from they side sheet. The angling of the inner end of the brick present the described The parts,

distance between the side y sheet and the adjacent arch tube. 2 0 eases the'side sheet vthe ad"acentk arch ytube and in such cases In other cases an inclined side sheet zas'encountered, and in such cases I prefer y irebox. In this manner I positively insure the retention of the brick upon the supporting` studs. Obviously, the inner end of the brick cannot fall as long as any portion of that end overhangs the arch tube. In securingthis zulvantage, I also leave the inner end of the brick free to move upon the arch tube and thus secure the advantages of Aa marginal brick which automatically adjusts itself to changes of positionl between the tube and the side sheet, due to the exansion, contraction, and warping thereof: As stated, the ends of my novel marginal arch bricks are reversely symmetrical and it will be obvious' that the marginal bricks may be inverted at will. It should be noted that th se many advantages are secured in and by a marginal brick form that is extremely simple in outline and very inexpensive to manufacture, and. which may be piled and transported and stored with minimum danger of breakage.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 2 The herein described improvement, comprising a locomotive firebox, its side sheets and inclined:water-circulating arch tubes, in combination with an arch body of refractory bricks supported by said arch tubes and substantially co-extensive therewith, rows of marginal-bricksupporting studs provided Ain said side sheets substantially in the plane of said tubes, and marginal bricks, each presenting an acute angled end having its vertex against a side sheet and having a plane surface resting upon 'one of said studs, and each also presenting a diagonally opposite acute angled end having a p lane surface upon and against the adjacent arch tube, substantially as and for thepurposes described.A

I testimony whereof, I have hereunto set my \and this 28thday of December, 1915.

JOHN P.y NEFF. 

